Question
Physics Question on physical world
In a new system of units called star units, 1kg∗=10kg , 1m∗=1km and 1s∗=1 minute, what will be the value of 1J in the new system ?
A
2.4×10−8J∗
B
3.6×10−4J∗
C
4.2×10−3J∗
D
4.2×10−2J∗
Answer
3.6×10−4J∗
Explanation
Solution
Given that
For star units 1kg∗=10kg
1m∗=1km
and 1s∗=1m
The value of 1J in star units
1J=1[ML2T−2]=1[1kgm2s−2]
=[1×101kg+(1000m∗)2+(60s∗)−1]
=3.6×154J